during a hand, at the flop, i had a open ended str8, an opened str8 flush, and a flush draw. how many outs would i have?
Usually 15. 9 of the suit and the 8 to make the straight (minus the two of the suit).
This makes you >50% to win.
Add to that the possible pairs, and you got over 20 (27 if every card was still live) . Hell, that means over half the outstanding deck will make you a hand with at least a pair. And 15 of those will make you the str8 or flush.
Bet this hand